automatic trans for 239 flat head
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
I agree, Bill, but with some clarification. Up until around 1990, Ford beancounters or engineers deemed that most cars with AOD would get a light-duty servo for the OD band (or clutch?), taxi's and police cars got a medium duty one, and there was a HD one for trucks I think. Anyway, by 1990 just about all got the HD servo, and around the same time they changed from the ultra-difficult-to-adjust hard linkage to a cable system that was much better. A few years later they changed to electronic control. I know of no major issues with the later trans's, but they are still not anything in comparison to the typical 4L60E that GM cars of the period came with. You would think that Detroit would have figured out transmissions aren't the place to save money after the UltraDrive fiasco (which cost me $3k personally, and ended my love affair with Chryslers)...
Some of the details were directly copied from another transmission.
That earlier transmission cost the beleagured company that originally developed it in-house (1949) over $800,000 1955 US dollars in warranty costs. I kid you not.
When used as originally developed, it was a reliable tho sluggish transmission. But when it was converted to a "gear start," and put behind a large OHV V8 engine, it failed miserably.
In March of 1956, the company closed its doors.
Twin Ultramatic killed the Packard Motor Car Company.
Elder User
Joined: Sep 2007
Posts: 968
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From: webster wi
i know this is old but if you havent found it yet flat-o-products makes a kit to do it
The Flat-o-Matic
The Flat-o-Matic
Post Fiend
Joined: Jun 2001
Posts: 7,493
Likes: 7
From: Erie, pa
I could see a Flatmotor Ranger sitting in my Fun Driveway.
Warmed up Flathead - Built C4 (Thay are hard as nails) - 8.8 or 9" in the back with some traction bars - a little added weight on slider rails in the bed.
I be lookin' for Tuners
Warmed up Flathead - Built C4 (Thay are hard as nails) - 8.8 or 9" in the back with some traction bars - a little added weight on slider rails in the bed.
I be lookin' for Tuners
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